“I adored you from the day I met you when I was nineteen and I always will,” Grande wrote. “I can’t believe you aren’t here anymore. I really can’t wrap my head around it. We talked about this. So many times. I’m so mad, I’m so sad I don’t know what to do. You were my dearest friend. For so long. Above anything else. I’m so sorry I couldn’t fix or take your pain away. I really wanted to. The kindest, sweetest soul with demons he never deserved. I hope you’re okay now. Rest.”

The caption accompanies a video post of Miller in a black hoodie that contains the phrase “Everything will be OK” in a small white font across the front.

In the video, Miller starts to tell a story but stops and laughs with Grande when he realizes she’s recording him.